EESchema Schematic File Version 2
LIBS:power
LIBS:device
LIBS:transistors
LIBS:conn
LIBS:linear
LIBS:regul
LIBS:74xx
LIBS:cmos4000
LIBS:adc-dac
LIBS:memory
LIBS:xilinx
LIBS:special
LIBS:microcontrollers
LIBS:dsp
LIBS:microchip
LIBS:analog_switches
LIBS:motorola
LIBS:texas
LIBS:intel
LIBS:audio
LIBS:interface
LIBS:digital-audio
LIBS:philips
LIBS:display
LIBS:cypress
LIBS:siliconi
LIBS:opto
LIBS:atmel
LIBS:contrib
LIBS:valves
LIBS:vr_mmm-cache
EELAYER 27 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 1 1
Title ""
Date "15 mar 2015"
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L LM2903 U1
U 1 1 536C6026
P 5300 2350
F 0 "U1" H 5450 2500 60  0000 C CNN
F 1 "LM2903" H 5500 2150 60  0000 C CNN
F 2 "" H 5300 2350 60  0000 C CNN
F 3 "" H 5300 2350 60  0000 C CNN
	1    5300 2350
	1    0    0    -1  
$EndComp
$Comp
L R R13
U 1 1 536C67FB
P 5450 1700
F 0 "R13" V 5530 1700 40  0000 C CNN
F 1 "47k" V 5457 1701 40  0000 C CNN
F 2 "~" V 5380 1700 30  0000 C CNN
F 3 "~" H 5450 1700 30  0000 C CNN
	1    5450 1700
	0    -1   -1   0   
$EndComp
$Comp
L R R11
U 1 1 536C680F
P 4850 1850
F 0 "R11" V 4930 1850 40  0000 C CNN
F 1 "470k" V 4857 1851 40  0000 C CNN
F 2 "~" V 4780 1850 30  0000 C CNN
F 3 "~" H 4850 1850 30  0000 C CNN
	1    4850 1850
	0    -1   -1   0   
$EndComp
$Comp
L R R1
U 1 1 536C681E
P 3500 2100
F 0 "R1" V 3580 2100 40  0000 C CNN
F 1 "20k" V 3507 2101 40  0000 C CNN
F 2 "~" V 3430 2100 30  0000 C CNN
F 3 "~" H 3500 2100 30  0000 C CNN
	1    3500 2100
	1    0    0    -1  
$EndComp
$Comp
L R R7
U 1 1 536C682D
P 4100 2700
F 0 "R7" V 4180 2700 40  0000 C CNN
F 1 "1k" V 4107 2701 40  0000 C CNN
F 2 "~" V 4030 2700 30  0000 C CNN
F 3 "~" H 4100 2700 30  0000 C CNN
	1    4100 2700
	0    -1   -1   0   
$EndComp
$Comp
L R R9
U 1 1 536C683C
P 4600 2700
F 0 "R9" V 4680 2700 40  0000 C CNN
F 1 "1k" V 4607 2701 40  0000 C CNN
F 2 "~" V 4530 2700 30  0000 C CNN
F 3 "~" H 4600 2700 30  0000 C CNN
	1    4600 2700
	0    -1   -1   0   
$EndComp
$Comp
L +5V #PWR01
U 1 1 536C6890
P 4850 2700
F 0 "#PWR01" H 4850 2790 20  0001 C CNN
F 1 "+5V" H 4850 2790 30  0000 C CNN
F 2 "" H 4850 2700 60  0000 C CNN
F 3 "" H 4850 2700 60  0000 C CNN
	1    4850 2700
	0    1    1    0   
$EndComp
$Comp
L GND #PWR02
U 1 1 536C68B1
P 3850 2700
F 0 "#PWR02" H 3850 2700 30  0001 C CNN
F 1 "GND" H 3850 2630 30  0001 C CNN
F 2 "" H 3850 2700 60  0000 C CNN
F 3 "" H 3850 2700 60  0000 C CNN
	1    3850 2700
	0    1    1    0   
$EndComp
$Comp
L GND #PWR03
U 1 1 536C68C1
P 5200 2750
F 0 "#PWR03" H 5200 2750 30  0001 C CNN
F 1 "GND" H 5200 2680 30  0001 C CNN
F 2 "" H 5200 2750 60  0000 C CNN
F 3 "" H 5200 2750 60  0000 C CNN
	1    5200 2750
	1    0    0    -1  
$EndComp
$Comp
L R R4
U 1 1 536C6973
P 3750 2450
F 0 "R4" V 3830 2450 40  0000 C CNN
F 1 "10k" V 3757 2451 40  0000 C CNN
F 2 "~" V 3680 2450 30  0000 C CNN
F 3 "~" H 3750 2450 30  0000 C CNN
	1    3750 2450
	0    -1   -1   0   
$EndComp
$Comp
L R R3
U 1 1 536C698E
P 3750 1850
F 0 "R3" V 3830 1850 40  0000 C CNN
F 1 "10k" V 3757 1851 40  0000 C CNN
F 2 "~" V 3680 1850 30  0000 C CNN
F 3 "~" H 3750 1850 30  0000 C CNN
	1    3750 1850
	0    -1   -1   0   
$EndComp
$Comp
L DIODE D1
U 1 1 536C69F4
P 4000 2050
F 0 "D1" H 4000 2150 40  0000 C CNN
F 1 " " H 4000 1950 40  0000 C CNN
F 2 "~" H 4000 2050 60  0000 C CNN
F 3 "~" H 4000 2050 60  0000 C CNN
	1    4000 2050
	0    -1   -1   0   
$EndComp
$Comp
L DIODE D3
U 1 1 536C6A03
P 4350 2050
F 0 "D3" H 4350 2150 40  0000 C CNN
F 1 " " H 4350 1950 40  0000 C CNN
F 2 "~" H 4350 2050 60  0000 C CNN
F 3 "~" H 4350 2050 60  0000 C CNN
	1    4350 2050
	0    1    1    0   
$EndComp
Wire Wire Line
	4000 2450 4800 2450
Wire Wire Line
	4350 2250 4350 2700
Connection ~ 4350 2700
Connection ~ 4000 2450
Wire Wire Line
	4000 1850 4600 1850
Connection ~ 4600 1850
Connection ~ 4000 1850
Connection ~ 4350 2450
Wire Wire Line
	4000 2250 4000 2450
Wire Wire Line
	4600 1850 4600 2250
Wire Wire Line
	4600 2250 4800 2250
Connection ~ 3500 1850
Connection ~ 3500 2450
Connection ~ 4350 1850
$Comp
L C C3
U 1 1 536C6D79
P 3150 2050
F 0 "C3" H 3150 2150 40  0000 L CNN
F 1 "1000" H 3156 1965 40  0000 L CNN
F 2 "~" H 3188 1900 30  0000 C CNN
F 3 "~" H 3150 2050 60  0000 C CNN
	1    3150 2050
	1    0    0    -1  
$EndComp
$Comp
L C C4
U 1 1 536C6D88
P 3150 2750
F 0 "C4" H 3150 2850 40  0000 L CNN
F 1 "1000" H 3156 2665 40  0000 L CNN
F 2 "~" H 3188 2600 30  0000 C CNN
F 3 "~" H 3150 2750 60  0000 C CNN
	1    3150 2750
	1    0    0    -1  
$EndComp
$Comp
L C C1
U 1 1 536C6D97
P 2800 2750
F 0 "C1" H 2800 2850 40  0000 L CNN
F 1 "1000" H 2806 2665 40  0000 L CNN
F 2 "~" H 2838 2600 30  0000 C CNN
F 3 "~" H 2800 2750 60  0000 C CNN
	1    2800 2750
	1    0    0    -1  
$EndComp
$Comp
L C C7
U 1 1 536C6DA6
P 5000 1550
F 0 "C7" H 5000 1650 40  0000 L CNN
F 1 "0.1" H 5006 1465 40  0000 L CNN
F 2 "~" H 5038 1400 30  0000 C CNN
F 3 "~" H 5000 1550 60  0000 C CNN
	1    5000 1550
	0    1    1    0   
$EndComp
$Comp
L GND #PWR04
U 1 1 536C6DB5
P 4800 1550
F 0 "#PWR04" H 4800 1550 30  0001 C CNN
F 1 "GND" H 4800 1480 30  0001 C CNN
F 2 "" H 4800 1550 60  0000 C CNN
F 3 "" H 4800 1550 60  0000 C CNN
	1    4800 1550
	0    1    1    0   
$EndComp
$Comp
L +5V #PWR05
U 1 1 536C6DC4
P 5200 1400
F 0 "#PWR05" H 5200 1490 20  0001 C CNN
F 1 "+5V" H 5200 1490 30  0000 C CNN
F 2 "" H 5200 1400 60  0000 C CNN
F 3 "" H 5200 1400 60  0000 C CNN
	1    5200 1400
	1    0    0    -1  
$EndComp
Wire Wire Line
	5200 1400 5200 1950
Connection ~ 5200 1550
Connection ~ 5200 1700
Wire Wire Line
	5800 2350 6450 2350
Wire Wire Line
	5700 1700 5900 1700
Wire Wire Line
	5900 1700 5900 2350
Connection ~ 5900 2350
Wire Wire Line
	5100 1850 5900 1850
Wire Wire Line
	2300 1850 3500 1850
Wire Wire Line
	2300 2450 3500 2450
Wire Wire Line
	2800 2550 2800 1850
Connection ~ 2800 1850
Wire Wire Line
	3150 2250 3150 2550
Connection ~ 3150 1850
Connection ~ 3150 2450
$Comp
L GND #PWR06
U 1 1 536C6F94
P 2800 2950
F 0 "#PWR06" H 2800 2950 30  0001 C CNN
F 1 "GND" H 2800 2880 30  0001 C CNN
F 2 "" H 2800 2950 60  0000 C CNN
F 3 "" H 2800 2950 60  0000 C CNN
	1    2800 2950
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR07
U 1 1 536C6FA3
P 3150 2950
F 0 "#PWR07" H 3150 2950 30  0001 C CNN
F 1 "GND" H 3150 2880 30  0001 C CNN
F 2 "" H 3150 2950 60  0000 C CNN
F 3 "" H 3150 2950 60  0000 C CNN
	1    3150 2950
	1    0    0    -1  
$EndComp
$Comp
L LM2903 U1
U 2 1 536C75DC
P 5300 3750
F 0 "U1" H 5450 3900 60  0000 C CNN
F 1 "LM2903" H 5500 3550 60  0000 C CNN
F 2 "" H 5300 3750 60  0000 C CNN
F 3 "" H 5300 3750 60  0000 C CNN
	2    5300 3750
	1    0    0    -1  
$EndComp
$Comp
L R R10
U 1 1 536C75EB
P 4600 4150
F 0 "R10" V 4680 4150 40  0000 C CNN
F 1 "1k" V 4607 4151 40  0000 C CNN
F 2 "~" V 4530 4150 30  0000 C CNN
F 3 "~" H 4600 4150 30  0000 C CNN
	1    4600 4150
	0    -1   -1   0   
$EndComp
$Comp
L R R8
U 1 1 536C75FA
P 4100 4150
F 0 "R8" V 4180 4150 40  0000 C CNN
F 1 "1k" V 4107 4151 40  0000 C CNN
F 2 "~" V 4030 4150 30  0000 C CNN
F 3 "~" H 4100 4150 30  0000 C CNN
	1    4100 4150
	0    -1   -1   0   
$EndComp
$Comp
L R R14
U 1 1 536C7609
P 5450 3050
F 0 "R14" V 5530 3050 40  0000 C CNN
F 1 "47k" V 5457 3051 40  0000 C CNN
F 2 "~" V 5380 3050 30  0000 C CNN
F 3 "~" H 5450 3050 30  0000 C CNN
	1    5450 3050
	0    -1   -1   0   
$EndComp
$Comp
L R R12
U 1 1 536C7618
P 4850 3250
F 0 "R12" V 4930 3250 40  0000 C CNN
F 1 "470k" V 4857 3251 40  0000 C CNN
F 2 "~" V 4780 3250 30  0000 C CNN
F 3 "~" H 4850 3250 30  0000 C CNN
	1    4850 3250
	0    -1   -1   0   
$EndComp
$Comp
L R R2
U 1 1 536C7627
P 3500 3500
F 0 "R2" V 3580 3500 40  0000 C CNN
F 1 "20k" V 3507 3501 40  0000 C CNN
F 2 "~" V 3430 3500 30  0000 C CNN
F 3 "~" H 3500 3500 30  0000 C CNN
	1    3500 3500
	1    0    0    -1  
$EndComp
$Comp
L R R5
U 1 1 536C7636
P 3750 3250
F 0 "R5" V 3830 3250 40  0000 C CNN
F 1 "10k" V 3757 3251 40  0000 C CNN
F 2 "~" V 3680 3250 30  0000 C CNN
F 3 "~" H 3750 3250 30  0000 C CNN
	1    3750 3250
	0    -1   -1   0   
$EndComp
$Comp
L R R6
U 1 1 536C7645
P 3750 3850
F 0 "R6" V 3830 3850 40  0000 C CNN
F 1 "10k" V 3757 3851 40  0000 C CNN
F 2 "~" V 3680 3850 30  0000 C CNN
F 3 "~" H 3750 3850 30  0000 C CNN
	1    3750 3850
	0    -1   -1   0   
$EndComp
$Comp
L C C5
U 1 1 536C7663
P 3150 3450
F 0 "C5" H 3150 3550 40  0000 L CNN
F 1 "1000" H 3156 3365 40  0000 L CNN
F 2 "~" H 3188 3300 30  0000 C CNN
F 3 "~" H 3150 3450 60  0000 C CNN
	1    3150 3450
	1    0    0    -1  
$EndComp
$Comp
L C C6
U 1 1 536C7672
P 3150 4150
F 0 "C6" H 3150 4250 40  0000 L CNN
F 1 "1000" H 3156 4065 40  0000 L CNN
F 2 "~" H 3188 4000 30  0000 C CNN
F 3 "~" H 3150 4150 60  0000 C CNN
	1    3150 4150
	1    0    0    -1  
$EndComp
$Comp
L C C2
U 1 1 536C7681
P 2800 4150
F 0 "C2" H 2800 4250 40  0000 L CNN
F 1 "1000" H 2806 4065 40  0000 L CNN
F 2 "~" H 2838 4000 30  0000 C CNN
F 3 "~" H 2800 4150 60  0000 C CNN
	1    2800 4150
	1    0    0    -1  
$EndComp
$Comp
L DIODE D2
U 1 1 536C7690
P 4000 3450
F 0 "D2" H 4000 3550 40  0000 C CNN
F 1 " " H 4000 3350 40  0000 C CNN
F 2 "~" H 4000 3450 60  0000 C CNN
F 3 "~" H 4000 3450 60  0000 C CNN
	1    4000 3450
	0    -1   -1   0   
$EndComp
$Comp
L DIODE D4
U 1 1 536C769F
P 4350 3450
F 0 "D4" H 4350 3550 40  0000 C CNN
F 1 " " H 4350 3350 40  0000 C CNN
F 2 "~" H 4350 3450 60  0000 C CNN
F 3 "~" H 4350 3450 60  0000 C CNN
	1    4350 3450
	0    1    1    0   
$EndComp
Wire Wire Line
	4000 3850 4800 3850
Wire Wire Line
	4350 3650 4350 4150
Wire Wire Line
	4000 3850 4000 3650
Wire Wire Line
	4000 3250 4600 3250
Wire Wire Line
	5800 3750 6450 3750
Wire Wire Line
	2300 3250 3500 3250
Wire Wire Line
	2300 3850 3500 3850
Wire Wire Line
	3150 3650 3150 3950
Wire Wire Line
	2800 3950 2800 3250
Wire Wire Line
	4600 3250 4600 3650
Wire Wire Line
	4600 3650 4800 3650
Wire Wire Line
	5700 3050 5900 3050
Wire Wire Line
	5900 3050 5900 3750
Connection ~ 5900 3750
Wire Wire Line
	5100 3250 5900 3250
Connection ~ 5900 3250
$Comp
L GND #PWR08
U 1 1 536C78D3
P 3850 4150
F 0 "#PWR08" H 3850 4150 30  0001 C CNN
F 1 "GND" H 3850 4080 30  0001 C CNN
F 2 "" H 3850 4150 60  0000 C CNN
F 3 "" H 3850 4150 60  0000 C CNN
	1    3850 4150
	0    1    1    0   
$EndComp
$Comp
L GND #PWR09
U 1 1 536C78E2
P 3150 4350
F 0 "#PWR09" H 3150 4350 30  0001 C CNN
F 1 "GND" H 3150 4280 30  0001 C CNN
F 2 "" H 3150 4350 60  0000 C CNN
F 3 "" H 3150 4350 60  0000 C CNN
	1    3150 4350
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR010
U 1 1 536C78F1
P 2800 4350
F 0 "#PWR010" H 2800 4350 30  0001 C CNN
F 1 "GND" H 2800 4280 30  0001 C CNN
F 2 "" H 2800 4350 60  0000 C CNN
F 3 "" H 2800 4350 60  0000 C CNN
	1    2800 4350
	1    0    0    -1  
$EndComp
$Comp
L +5V #PWR011
U 1 1 536C7900
P 4850 4150
F 0 "#PWR011" H 4850 4240 20  0001 C CNN
F 1 "+5V" H 4850 4240 30  0000 C CNN
F 2 "" H 4850 4150 60  0000 C CNN
F 3 "" H 4850 4150 60  0000 C CNN
	1    4850 4150
	0    1    1    0   
$EndComp
$Comp
L +5V #PWR012
U 1 1 536C790F
P 5200 3050
F 0 "#PWR012" H 5200 3140 20  0001 C CNN
F 1 "+5V" H 5200 3140 30  0000 C CNN
F 2 "" H 5200 3050 60  0000 C CNN
F 3 "" H 5200 3050 60  0000 C CNN
	1    5200 3050
	0    -1   -1   0   
$EndComp
Connection ~ 4600 3250
Connection ~ 4350 3250
Connection ~ 4000 3250
Connection ~ 4000 3850
Connection ~ 4350 3850
Connection ~ 4350 4150
Connection ~ 3500 3250
Connection ~ 3150 3250
Connection ~ 3150 3850
Connection ~ 4350 3650
Connection ~ 4000 3650
Wire Wire Line
	3500 3850 3500 3750
Connection ~ 3500 3750
Connection ~ 3150 3650
Connection ~ 3150 3950
Connection ~ 2800 3950
Connection ~ 2800 2550
Connection ~ 3150 2550
Connection ~ 4800 2250
Connection ~ 4800 2450
Connection ~ 5100 1850
Connection ~ 5700 1700
Connection ~ 5800 2350
Connection ~ 4800 3850
Connection ~ 4800 3650
Connection ~ 5100 3250
Connection ~ 5800 3750
Connection ~ 3500 3850
Text Label 6450 2350 0    60   ~ 0
VR1_OUT
Text Label 6450 3750 0    60   ~ 0
VR2_OUT
Text Label 2300 1850 2    60   ~ 0
VR1_IN+
Text Label 2300 2450 2    60   ~ 0
VR1_IN-
Text Label 2300 3250 2    60   ~ 0
VR2_IN+
Text Label 2300 3850 2    60   ~ 0
VR2_IN-
Connection ~ 5900 1850
Connection ~ 5200 1950
Wire Wire Line
	3500 2450 3500 2350
Connection ~ 4350 2250
Connection ~ 4000 2250
Connection ~ 3500 2350
Connection ~ 2800 3250
$EndSCHEMATC